Apparatus for burning fuel



Feb. 25, 1936. A; J. BOYNTON 2,031,757

APPARATUS FOR BURNING FUEL Filed Dec. 29, 1933 Patented Feb. 25, 1936 2,031,757

UNITED STATES PATENT. OFFICE 2,031,757 APPARATUS FOR BURNING FUEL Arthur J. Boynton, Winnetka, 111., assignor to H. A Brassert 8; Company, Chicago, 111., a corporation of Illinois Application December 29, 1933, Serial No. 704,390

1 ,4 Claims. (Cl. 158-409) This invention relates to a new and improved motor 16, the flow of air being controlled by fuel burning device, and more particularly to a damper 1'1. The air is led from the preheating burner construction for burning of gaseous fuels. chamber through passage 18 to the burner 19.

Theinvention relates to a burner for use with The gaseous fuel is led through passage 211 conmetal treating furnaces such as'reheating fur-e trolled by damper 21 to the burner 19. naces or with other types of furnaces where high The burner 19 is provided with a pair of gates I temperatures are required. The burner con- 22 and 23, as shown in Figure 2, which are moved struction is so designed as to provide a separate vertically by rods 24 and 25. The movement of entrance for the gas and air and to provide a these rods is controlled by the piston in cylinder stratification of gas and air at the discharge from 26 shown in Figure 1. Fluid under pressure is 10 the burner. supplied to opposite ends of cylinder 26 through It is an object of the present invention to prolines 2'1 and 28. This fluid under pressure is vide a new and improved bLu'ner for gaseous fuel. discharged through nozzle 29, the fluid being sup- It is an additional object to provide a conplied through pipe 31). The nozzle 29 is pivotally 1.3 struction of this character in which the gas and supported at 31 and is restrained against move- 13 air for combustion are introduced in separate ment to the left by spring 32 controlled by the strata. adjacent wheel 33. The opposite side of the It is also an object to provide a construction nozzle 29 is engaged by the thrust rod 34 conin which separate chambers or sections of heat nected to diaphragm 35 located between the resistant material may be provided for the air chambers 36 and 3'1. The chamber 3'1 is open to 20 I and gas, these sections being removably placed in the atmosphere, while the chamber 36 is conthe burner housing. nected by pipe 38 toan orifice in the burner It is a further object to provide a burner aslocated at sembly having means for determining the velocity The burner 19 consists in an outer housing 41) 2 5 of the gas and air issuing from the burner so that which may be made of metal and which has an the velocity may be varied at will or maintained upwardly extending outer-opening 41 and a downconstant in spite of variations in the rate of flow wardly extending opening 42. The housing 411 of air and gas. of the character shown is of a size to retain two It is an additional object to provide a coninterior chambers 43 and 44, shown in perspecstruction in which a lower air strata of non- .tive in Figure 4. The section of Figure 2 is 30 oxidizing gas may be provided adjacent oxidiztaken through the chamber 44, which has an upable substances which require to be heated, while wardly facing opening 45 in registration with the at the same time providing combustion for heatopening 41 of the housing. The chamber 43 is ing this material. identical with chamber 44, but is placed in the Other and further objects will appear as the reverse position so that its opening registers with 35 description proceeds. the opening 42 in the housing.

I have shown certain preferred embodiments As shown in Figure 2, the inside wall of the of my invention in the accompanying drawing, chambers may be inclined so as to reduce the in which area somewhat towards the discharge end which Figure 1 shows one form of my improved burner is controlled by the gates 22 and 23. These 40 connected to a reheating furnace, the figure being gates are provided with beveled edges 46 and 41,

in vertical section; it being noted that the bevel has a longer edge Figure 2 is an enlarged longitudinal section of in the direction from which the flow proceeds. one form of burner construction; This has the important function of reducing tur- Figure 3 is a view similar to Figure 2, but bulence at this point. 45 showing the modified form of construction; The burner housing 50 of Figure 3 is similar Figure 4 is a perspective view showing a pair in general design to that just described. It has of the interior chambers of the burners; and been shown without any interior removable Figure 5 is a section taken on line 5-5 of chambers, the housing itself having walls form- 50 Figure 2, and shown upon a reduced scale. ing the chambers. This type of burner may be 50 Referring first to Figure l, a reheating furnace used where the temperature of the gases is not has been shown having the hearth 11, the resuch as to require removable and replaceable generator 12, and the air jacket or housing 13 liners of heat resistant or refractory material. surrounding the hearth. The air intake 14 is In this construction the control gates 51 and 52 sup-plied with air by a blower 16 driven by a are carried on pivot shafts 53 and 54. These 55 shafts are shown as having coacting arcuate racks and 56 indicated in broken lines. The operating rod 51 serves to rotate the shaft 54 and through the interacting racks the two gates are simultaneously opened or closed. It will be understood that the forms of gate shown in Figures 2 and 3 may be used interchangeably with the two forms of burner housings.

While the burner has been shown as being made up of two sections, it is obvious that any desired number of sections may be incorporated in the burner. It is also possible to locate the burner so that the interior chambers are superposed rather than adjacent witha vertical wall between. In the use of such a burner, for example, a stratum of air may be sent below the roof to protect the roof against the excessive heat of the combustion below. The number of sections and their dimensions may be varied in accordance with the particular use and the fuel employed. The length of flame will increase as the sections are widened and their number decreased for an equal total area of burner. Further, the flame with any given construction of burner will be influenced by the character of the fuel used. By varying the details of the sectional construction, any desired character of flame with respect to length and maximum temperature may be obtained. With horizontal layers of air and gas the lower layer of gas will prevent contact between an oxidizable member, such as metal requiring to be heated, and excess air of combustion, at the same time that the excess air will protect the roof.

It will be noted that the gate construction of Figure 2 is such that not only may the effective discharge area of the burner be modified, but also the axis of the flame may be raised and lowered by simultaneously moving the two gates in the same direction. In this way the flame may be projected at the height and in the direction desired. By the use of an automatic control, such as shown in Figure 1, the gates may be automatically operated to maintain constant flame conditions. In the simple type of control shown,

variation in the pressure in the burner acts through the medium of the control apparatus to open or close the gates.

While I have shown certain preferred forms of construction, these are understood to be illustrative only, as I contemplate such changes and modifications as come within the spirit and scope of the appended claims.

I claim:

1. A gas burner comprising a housing, similar hollow sections of heat resisting material in said housing in reversed arrangement whereby air and gas may be introduced into the burner from different directions through adjacent sections of the heat resisting material.

2. A gas burner comprising a housing, similar hollow sections of heat resisting material in said housing in reversed arrangement whereby air and gas may be introduced into the burner from different directions through adjacent sections of the heat resisting material, the discharge openings of the sections being adjacently located and adapted to discharge parallel streams.

3. A gas burner comprising a housing, similar hollow sections of heat resisting material in said housing in reversed arrangement whereby air and gas may be introduced into the burner from different directions through adjacent sections of the heat resisting material, and means for varying the effective area of the discharge from the sections.

4. A gas burner comprising a housing, similar hollow sections of heat resisting material in said housing in reversed arrangement whereby air and gas may be introduced into the burner from different directions through adjacent sections of the heat resisting material, the discharge openings of the sections being adjacently located and adapted to discharge parallel streams, and gates placed on either side of the combined sections for varying the effective area of the discharge from the sections, said gates being independently movable whereby the effective axis of the discharge port may be moved.

ARTHUR J. BOYNTON. 

